Flash: Transmission Diagnostic and Shift Enhancements
This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software.
Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one of the following Diagnostic Trouble Codes (DTCs) have
been set: U1424-00 - Implausible Engine Torque Signal Received.
P1DB8-00 - Unintended Torque Applied While in Neutral.
Customers may describe the following: Poor shift quality on coast down shifts (bumps) (LX and LD Only).
In addition, the following software enhancement is available: Improved transmission shifting during a limp mode.
